1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4343ea5c98ba65a16c362b37befaf0690a3c5606e3fb9351c3bef209e1e8e94a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ee3b5c7-5f71-488b-a7bc-73e49617b401.json and https://artists.proofprofile.net/proofs/artist/7ee3b5c7-5f71-488b-a7bc-73e49617b401.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f5a8b7c40164c8790db0c043c3d73a7bdeabe74adfc102ec0f8c0982590926. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71001241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786984ec844421af198d9b095736673b23d80209424d6e312a8bde9b51177e9d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71001243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4ea794812f21b1f8745314b75c2be4f63af4ffcc3ce0100e6871f4b7638e95. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71000950.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e3c2dddaecfbde31f9db858669f319c7bd4ecd9a06da1215d8b91e2f2e43c4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71001245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4f4ccd637953e16ee604693f69a694cf7af83c96820196cbec1929d6811c98. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71001244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf79073dbf8f37696b83e580f791bf77713558d040f9e18972853fb9135ab08. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71001248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f1c0618ab907bdf5eae61f5b5b651de2d43bb1cffad6f15b620c38ebf72433. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71001242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb62cd63f60cba1f96b5642f1b909287fd13e116600e4ef14345198ed3acaea8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70801500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cffc21f6922c610ca9512420148fe01593e8937e54e93d9c5815627f228d47. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26155c42e2e1d87aa86fd1c3dd6455d44116bde82b5d6d1136ab5305e3f518d2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e1e7c32e04899f47379f5ef77c771d422490b5287fd34f8633a64361d89ef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a854edc1f3c03ac07156fc1c93e4bf8573d90910dd6fdeace014d77816b17e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cf972a2b563b867ef98e620077b95aeae6fb19948a8b6897974a87dda00958. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e02608c50d64b7de3663562a8ca06d611ba43bca15d205f620a5c18d060712. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bba6d668c66f460611dbafbbaa3aa3952bd07637c3007209b07e8cee8c8c22a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b25acea80493455bc6ee7c6bdb7650d58a867357001081937601c2be2a89a9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3e897d792c865c23dce5b74c4b550cf6d21bbd8acd0ae6632e57c81ef5308f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900131.
Hvor Som Helst - Når Som Helst - Hampenberg Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc20e5661e0c11e9afb3a7877c1c6999ee739667c6b07b9b171f4ab2b71037c0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM70900135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35161d88daca6781cecc0135c4aac53074ca1d314eb8313e07de64bbd6ab0fb5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKBV71014301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f73f379f7d9eff3e0c8fa1a48b416e0d62dc97f7de1269b8bd7aa20a4ee64fa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKBV71014401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45fdf89d3c5b9a5cf04556ef6f026a1bee99c90bcabe0ff12ce3751d20c9ff6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKBV71014201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca07fb32436770457ec66f863fcb2e932547a9fbee53719bf6cff77393390a5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKBV71107501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74d2f181666fa8d4d9050d573d581e86d99acd439e6804239adf80c6b232607. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKBV71107401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4bc9ab063d81caf5ca83c2a7cd0ed51b64f6121cc35e44a35f4d0d240a0f22. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKBV71014001.